How do I get the Prove transaction hash, given a withdraw initiated in the L2 ?

[gndelia]

Did you check the documentation?

• Yes

Did you check for duplicate questions?

• Yes

Issue Description

I had this question created as an issue ethereum-optimism/optimism#9974
I'm using the OP SDK (I know it's deprecated), and given a completed withdrawal transaction hash, I know I can use getMessageReceipt to get the Claim transaction hash.

const l1Rcpt = await crossChainMessenger.getMessageReceipt(l2TxHash)
const l1TxHash = l1Rcpt.transactionReceipt.transactionHash

How can I get the prove transaction hash? I can't find a method in the docs that returns so. Should I do a mix of different calls?

Thanks

Additional Information

I'm using @eth-optimism/sdk v3.2.1

Feedback

No response

[joohhnnn]

Hi there if the prove transaction hash you mentioned here is fault proof distribute game hash, you can find it by the specify game, and you can find every games by game factory. you can refer this diagram.

[gndelia]

Hey @joohhnnn ! Thanks for answering. I am a bit of a newbie on the whole OP flow, so I am sorry if what follows is not correct 😅 .

I am not doing this on Optimism but on a Forked L2 from OP.

The prove step I am referring to is this one, after calling proveMessage.

I think this forked L2 is not using dispute games (Our L2 is not using FPAC contracts yet)

[joohhnnn]

oh I think I got your question
PLZ check this diagram

If I understand correctly you need user's withdraw Application transaction hash, you can make a filter with user address and L1StandardBridge address. If not, you can refer this way to get any data you wanted. First, you need to get a clear understanding of how the components interact with each other. The diagram above is a great starting point.